جستجوی استاد راهنمای دانشگاهی

Patrick Willems is a full Professor at KU Leuven's Faculty of Engineering Sciences, Department of Civil Engineering. He serves as the head of the Hydraulics Subdivision within the Hydraulics and Geotechnics unit. Professor Willems holds multiple significant roles including chairman of the ADS Bureau, member of the Faculty Council of Engineering Sciences, and participant in the Leuven One Health Institute and KU Leuven Institute for Urban Studies (LUSI). His work addresses critical global water management challenges through advanced hydrological modeling and climate change adaptation strategies. Professor Willems' research spans several critical areas in water resources engineering. His primary expertise includes urban hydrology and river engineering, statistical hydrology with focus on flood prediction and risk analysis, integrated river basin management, precipitation analysis, and climate change impacts on hydrological extremes. He employs both traditional hydrological modeling approaches and innovative machine learning techniques to develop practical solutions for flood warning systems, urban water management, and climate adaptation planning. His research integrates statistical methods, numerical modeling, and data science to address complex water management problems across multiple geographical contexts. Professor Willems leads multiple major international research projects examining hydrological extremes in transboundary river basins, natural climate adaptation measures, hydrological modeling of peatland areas, and deep learning-based prediction of hydrological extremes. His work spans various geographical contexts including Belgium, Vietnam, Bolivia, Tanzania, and the Congo Basin, demonstrating both local relevance and global applicability of his research. Within KU Leuven, Professor Willems teaches diverse courses including Environmental Problems and Techniques, Statistics and Data Science, Stochastic Hydrology, Urban and River Hydrology and Hydraulics, River Modeling, and Probability and Statistics. He also leads the Hydraulic Engineering Project course and an Artificial Intelligence Project course, reflecting his commitment to integrating traditional engineering knowledge with modern computational approaches. As head of the Hydraulics Subdivision, he oversees research activities focused on developing advanced water engineering tools and methodologies that bridge theoretical advancements with practical applications for water management authorities.

• Hydrology
• River Engineering
• Flood Prediction
• +۷ مورد دیگر

Kaighin McColl is an Associate Professor at Harvard University with joint appointments in the Department of Earth and Planetary Sciences and the School of Engineering and Applied Sciences. His research focuses on the terrestrial water cycle and its interactions with weather and climate over land. PhD from MIT (2017) with NSF Graduate Research Fellowship Bachelor's degrees in environmental engineering and applied mathematics from University of Melbourne (2009) Research interests include: Water limitation effects on evapotranspiration Surface energy balance dynamics Atmospheric boundary layer behavior Convective precipitation mechanisms Applications to storm, drought, and heatwave forecasting Scientific contributions span 15 recent articles analyzing soil moisture dynamics, climate engineering impacts, and land-atmosphere interactions. His work has practical implications for wildfire prediction and climate adaptation strategies. Scientific Awards: Sloan Research Fellowship in Earth System Science NSF CAREER award Kavli Fellow by the National Academy of Sciences McColl advises graduate students including Tara Gallagher, Aidan Matthews, and Mariya Pershyna. His lab emphasizes international collaboration and interdisciplinary research requiring physics, mathematics, and climate science expertise. Teaching responsibilities include two different undergraduate course teaching fellowships during PhD training.

• Terrestrial Water Cycle
• Climate Science
• Hydrology
• +۵ مورد دیگر

Dr. Samuel Cheng is an Associate Professor at the Gallogly College of Engineering , University of Oklahoma , specializing in Electrical and Computer Engineering . He holds a Ph.D. in Electrical Engineering from Texas A&M University (2004), preceded by M.S. and M.Phil. degrees from the University of Hawaii and Hong Kong University of Science and Technology. Education: B.S. (University of Hong Kong, 1995), M.Phil. (HKUST, 1997), M.S. (University of Hawaii, 2000), Ph.D. (Texas A&M, 2004) Professional Experience: Senior Research Engineer at Advanced Digital Imaging Research (2004-2005), prior internships at Microsoft Asia and Panasonic Technologies His research focuses on Information Theory , Signal and Image Processing , and Pattern Recognition , with applications in remote sensing, urbanization analysis, and disaster monitoring. His publications span topics including urban impervious surface mapping , nighttime light analysis , and machine learning for environmental data . His work often integrates multi-source datasets (e.g., Landsat, LiDAR, social media) for spatiotemporal modeling. Technical Expertise: Spectral unmixing, machine learning, thermal remote sensing, GIS integration Key Applications: Power outage detection, vegetation-crime correlation, PM2.5 estimation, smart meter data fusion Dr. Cheng holds three US patents in digital watermarking and is affiliated with IEEE, Sigma Xi, and AAAS. His recent articles demonstrate a trend toward leveraging AI for remote sensing challenges and analyzing urbanization impacts on ecosystems.

• Information Theory
• Signal and Image Processing
• Remote Sensing
• +۴ مورد دیگر

Dr. Dominik Büeler is a Researcher at ETH Zurich's Institute for Atmospheric and Climate Science and staff member of the Center for Climate Systems Modeling (C2SM). His work bridges atmospheric dynamics with practical climate services, focusing on subseasonal prediction systems and their societal applications in Europe. Research Focus: Büeler's work centers on subseasonal-to-seasonal prediction, with emphasis on weather regime dynamics, extratropical cyclone behavior, and stratosphere-troposphere interactions. His research integrates large ensemble modeling, forecast verification, and climate impact assessment, particularly for European weather extremes. Recent projects examine heatwave mortality prediction, energy meteorology applications, and the role of moist processes in atmospheric blocking. Analysis of his publication record since 2021 reveals consistent advancement in subseasonal forecasting methodology, with growing emphasis on societal applications including public health (heat-related mortality) and energy sectors. His work increasingly connects fundamental atmospheric processes with operational forecasting systems, leveraging collaborations through the Subseasonal-to-Seasonal Prediction Project. Affiliations: Center for Climate Systems Modeling (C2SM) - Core Research Staff ETH Zurich Institute for Atmospheric and Climate Science MeteoSwiss Collaborator (Energy Meteorology) Büeler contributes to multidisciplinary teams developing climate services, with recent work supporting Swiss operational forecasting systems. His research group within C2SM focuses on improving subseasonal predictability through advanced diagnostics of model biases and atmospheric processes.

• Subseasonal-to-Seasonal Prediction
• Weather Regimes
• Extratropical Cyclones
• +۴ مورد دیگر

Mariam Zachariah serves as a Research Fellow at the Centre for Environmental Policy within the Faculty of Natural Sciences at Imperial College London. She is a core contributor to World Weather Attribution (WWA), an international scientific collaboration conducting rapid climate change attribution analyses for extreme weather events globally. Her work bridges climate science, vulnerability assessment, and policy-relevant research. Her educational foundation includes a PhD from the Indian Institute of Technology Bombay (IITB), where she investigated climate impacts on Indian agriculture. This research focused on drought and extreme temperature effects on crop yields in major agrarian regions, recognizing agriculture's critical role in India's climate-vulnerable economy. Zachariah's research centers on near-real-time attribution of extreme events to quantify human-induced climate change influences. Her expertise spans climate modeling, statistical analysis of extreme weather, and integrating vulnerability frameworks to assess compound impacts on communities. She examines how climate change interacts with socioeconomic factors to exacerbate disasters, particularly in agricultural systems and flood-prone regions worldwide. Analysis of her recent publications reveals a dominant focus on rapid attribution of droughts, floods, and heatwaves across diverse global contexts - from the Horn of Africa to Central Europe and South America. These studies consistently demonstrate climate change as a significant amplifier of event severity, while emphasizing how pre-existing vulnerabilities determine actual impacts. Her work increasingly addresses compound hazards and the intersection of climate change with infrastructure failures and land management. As a key member of the World Weather Attribution initiative, Zachariah collaborates with climate scientists, social scientists, and vulnerability experts in a unique operational framework that delivers scientific assessments within days of extreme events. This work directly informs policymakers, media, and affected communities about climate change's role in contemporary disasters.

• Climate Change Attribution
• Extreme Weather Events
• Agricultural Impacts of Climate Change
• +۳ مورد دیگر

Mingfang Ting is a Professor of Climate at the Columbia Climate School , affiliated with the Lamont-Doherty Earth Observatory . She co-directs the M.S. in Climate program and serves as Co-Senior Director for Education at the Columbia Climate School. Her research focuses on climate variability, extremes, Asian monsoons, Arctic sea ice, and climate change impacts on agriculture and health. Education: Ph.D. in Climate Dynamics (Princeton University, 1990), M.S. and B.S. from Peking University (1985, 1983). She has taught climate science at Columbia since 2004. Research Interests: Investigates weather/climate extremes in a warming world, Asian monsoon dynamics, Arctic sea ice variability, decadal climate modes, and hydroclimate impacts. Recent work emphasizes heatwaves, drought-flood linkages, and climate model projections. Key Projects (2020–2023): Advancing predictive understanding of North American drought Asian monsoon response to climate change Causal mechanisms of dry/humid heat extremes Arctic transport pathways and sea ice loss Scientific Contributions: Authored/co-authored over 200+ peer-reviewed articles. Her 2022 analysis of the 2021 North American heatwave and 2022 Pakistan floods exemplifies climate attribution science. Awards: AMS Distinguished Scientific Award (2021) AGU Fellow (2022) NSF CAREER Award (1995) Reuters' World’s Top Climate Scientists (2021) Leadership: Former Co-Editor-in-Chief of Journal of Climate (2020–2023). Active in climate education and global resilience initiatives through the Decarbonization Network. Labs/Teams: Leads interdisciplinary teams at LDEO focusing on climate dynamics and extreme event analysis. Collaborates internationally on monsoon systems and Arctic research.

• Climate Change Impact
• Climate Dynamics
• Precipitation Extremes
• +۵ مورد دیگر

Dr. Joshua New is a Distinguished R&D Staff Member at Oak Ridge National Laboratory (ORNL) and holds a Joint Faculty Position at The University of Tennessee since 2012. He leads research in building energy modeling, climate change science, and supercomputing. His work focuses on urban-scale energy systems, AI-driven analytics, and high-performance computing applications. Education: Ph.D. in Computer Science (University of Tennessee, 2009), M.S. in Computer Systems, B.S. in Computer Science and Mathematics (Jacksonville State University). His research interests include optimizing building energy efficiency, simulating climate impacts on urban infrastructure, and developing tools like AutoBEM and ModelAmerica to model 122.9 million U.S. buildings. He has over 150 peer-reviewed publications and led 45+ projects involving supercomputing, visual analytics, and AI for big data. Awards include the R&D 100 Award (2016), ASHRAE Distinguished Service Award (2018), and Lab-Corps (2015). His teams prioritize utility use cases and validate models against real-world data. He is a Senior IEEE member, Certified Energy Manager (CEM), and holds certifications in project management and energy efficiency. Key contributions include the Roof Savings Calculator Suite, AutoGen/AutoSim tools, and the ModelAmerica initiative. His work addresses national energy policy, heatwave resilience, and sustainable city design through interdisciplinary collaborations.

• Building Energy Modeling
• Climate Change Science
• Supercomputing
• +۵ مورد دیگر

John Drake is an Associate Professor in the Department of Sustainable Resources Management at the State University of New York College of Environmental Science and Forestry (SUNY-ESF). His research focuses on plant physiology and ecosystem ecology, particularly the physiological mechanisms underlying tree function and their scaling to ecosystem processes under climate change. He holds a Ph.D. from the University of Illinois (2010) in Ecology, Evolution, and Conservation Biology and a B.S. from Hope College (2005) in Biology. Prior roles include Research Fellow and Postdoc positions at institutions like the Hawkesbury Institute for the Environment and Boston University. His work emphasizes tree responses to temperature and water availability, including photosynthetic acclimation, carbon allocation, and stable isotope analysis. He leads the Drake Lab, which investigates tree ecophysiology and forest resilience. Current advisees include Sofia Arreaga (MS), Leslie Morrison (PhD), Jacob Olichney (PhD), and Taylor Wegner (MS). Notable grants include studies on New York forest responses to environmental change and climate resilience strategies for American chestnut restoration. Dr. Drake has received the University Distinguished Fellow award and contributed to over 40 peer-reviewed publications since 2007. His lab supports interdisciplinary research on forest carbon dynamics, soil-microbe interactions, and climate adaptation, with projects funded by agencies like the USDA and SUNY-ESF.

• Plant Physiology
• Ecosystem Ecology
• Climate Change Biology
• +۴ مورد دیگر

Professor Ashish Sharma is a Professor of Hydrology and Water Resources in the School of Civil and Environmental Engineering at the University of New South Wales, Sydney, Australia. With a PhD in Civil Engineering from Utah State University and extensive experience in hydrological research, he has established himself as a leading expert in his field. Dr. Sharma's research focuses on hydrological uncertainty, with particular emphasis on the impact of climate change and variability on hydrological practice. His work spans multiple areas including remote sensing applications, stochastic hydrological modeling approaches, development of hydrological models, and addressing key hydrology challenges such as design flood estimation and water resources management. He has made significant contributions to understanding how climate change affects hydrological extremes and water availability. His publications reveal a strong trend toward advanced modeling techniques for climate change impact assessment, with recent work focusing on spectral transformation methods, multivariate bias correction in climate models, flood forecasting improvements, and the relationship between temperature and precipitation extremes. His research increasingly integrates remote sensing data with hydrological modeling to address challenges in data-scarce regions. Professor Sharma has held significant leadership positions including President of the International Commission of Hydrologic Sciences (IAHS) Commission on Statistical Hydrology (STAHY) since 2016, service on the Australian Research Council's College of Experts twice, and participation on the Technical Committee for the Australian Rainfall and Runoff Design Flood Estimation guidelines (ARR2016). In addition to his research leadership, Professor Sharma actively mentors students and collaborates with researchers globally, as evidenced by his extensive publication record across top hydrology and climate journals. His work bridges theoretical hydrology with practical applications for water resources management under changing climate conditions.

• Hydrological uncertainty
• Climate change impact on hydrology
• Remote sensing applications
• +۶ مورد دیگر

Professor Joaquim Pinto is a leading climate scientist at the Karlsruhe Institute of Technology (KIT), where he serves as Head of the Working Group "Regional Climate and Weather Hazards" and as Spokesperson of the collegial institute management team. He holds the prestigious AXA Research Fund Chair position at the Institute of Meteorology and Climate Research - Troposphere Research (IMK-TRO). His academic background includes a Licenciate in Geophysical Sciences - Meteorology from the University of Lisbon (1990-1996), PhD studies at the University of Cologne (1998-2002), and academic positions at the University of Cologne (2002-2016) and University of Reading (2013-2016) before joining KIT in 2016. He became a Privatdozent (lecturer) at the University of Cologne in 2011 and earned his habilitation with research on extreme European wind storms. Professor Pinto's research focuses on mid-latitude meteorology and climatology, with special emphasis on extreme weather events , climate variability in Europe across multiple time scales, regional climate modeling and downscaling methods , and the diagnostic modeling and quantification of risks associated with extreme events affecting Europe. His work bridges fundamental climate science with practical applications for risk assessment and management. His extensive publication record demonstrates expertise in analyzing European windstorms, heatwaves, and compound extreme events. Recent work examines the impacts of climate change on wind energy potential, extreme precipitation events, and the complex interactions between atmospheric circulation patterns and regional climate extremes. His research often employs high-resolution climate modeling, statistical-dynamical downscaling approaches, and interdisciplinary collaborations to address pressing climate challenges. AXA Research Fund Chair in Regional Climate and Weather Hazards Professor Pinto teaches graduate and undergraduate courses including "Climate Modelling and Dynamics with ICON," "IPCC Assessment Report," "Climatology," "Energy Meteorology," "Methods of Data Analysis," and "Regional Climate and Weather Hazards." His teaching reflects his research expertise in climate modeling, extreme events, and regional climate change impacts.

• Mid-latitude meteorology
• Climatology
• Extreme weather events
• +۷ مورد دیگر

Emanuele Di Lorenzo is a Professor in the Department of Earth, Environmental, and Planetary Sciences at Brown University. Previously, he held roles as Professor and Director (2016–2022) of the Ocean Science and Engineering program at Georgia Tech, which he co-founded. He is the Chairman and co-founder of Ocean Visions, a non-profit transforming academic research into actionable ocean-based climate solutions, and co-leads the United Nations Ocean Decade Collaborative Center on Ocean-Climate Solutions. He earned a Ph.D. in ocean and climate sciences from Scripps Institution of Oceanography (2003) and has been at Brown since 2022. Education: B.S. in Marine Environmental Sciences, University of Bologna (1997) Ph.D. in Climate Sciences, Scripps Institution of Oceanography (2003) Research focuses on ocean climate dynamics, coastal systems, and solutions to climate challenges. Key areas include Large-scale ocean and climate modeling, Impacts of climate variability on marine ecosystems, Social-ecological-environmental systems, Coastal resilience strategies. He leads initiatives like the Ocean Vital Signs Network and the Global Ecosystem for Ocean Solutions (GEOS), fostering international collaboration. Publications emphasize marine heatwaves, Pacific decadal variability, and coastal flooding. Awards include the PICES SB Award (2013) and Georgia Tech’s Class of 1964 Teaching Award (2012). He advises over 36 Ph.D. students in ocean science programs and co-founded the OCE Data Science High School Internship to advance STEM equity. Labs/Teams: Leads the Di Lorenzo Research Group and collaborates with Woods Hole Oceanographic Institution. Current efforts prioritize equitable ocean solutions, coastal inundation modeling, and climate adaptation frameworks.

• Climate Science
• Oceanography
• Marine Ecosystems
• +۵ مورد دیگر

Sarah Kirkpatrick is a Professor at the Australian National University (ANU) in the Fenner School of Environment and Society . She is Deputy Director of Communications and Outreach for the ARC Centre of Excellence for 21st Century Weather , Chief Investigator at the ARC Centre of Excellence for Climate Extremes , and Vice President of the Australian Meteorological and Oceanographic Society . Education : BSc (Macquarie University) PhD (UNSW Sydney, 2010) Research Interests : Climate extremes, particularly heatwaves Extreme event attribution (natural vs anthropogenic drivers) Climate modeling and CMIP simulations Urban environment impacts on heatwaves Marine heatwaves and oceanic climate change Research Trends : Recent publications focus on heatwave mortality attribution (2009 Victorian heatwave), humid heat survivability thresholds, net-zero climate impacts, and interdisciplinary work with health experts. Her work integrates climate modeling with physiological vulnerability assessments to analyze age-group specific risks. Scientific Awards : 2021-2023 : Clarivate Highly Cited Researcher 2021 : Australian Academy of Science Dorothy Hill Medal 2016 : Australian Meteorological and Oceanographic Society Early Career Researcher Award Grants & Leadership : Current ANU Futures Scheme 2.0 project (2024-2028) Previously held ARC Discovery Early Career Researcher Award (2014-2017) and Future Fellowship (2017-2023) Scientific partner at the Monash Climate Change Communications Research Hub Outreach & Collaboration : A prominent science communicator in media, she collaborates with health experts, leads climate communication projects, and works with international research teams across 7+ institutions.

• Climate Science
• Heatwaves
• Extreme Event Attribution
• +۳ مورد دیگر

Dr. Jonathan T. Overpeck is the Samuel A. Graham Dean of the School for Environment and Sustainability (SEAS) at the University of Michigan, where he also holds the William B. Stapp Collegiate Professorship of Environmental Education. He is a Professor of both Climate and Space Sciences and Engineering, and Earth and Environmental Sciences, with a career spanning climate-vegetation interactions, abrupt climate change, monsoon dynamics, drought hydroclimate, sea level rise research, and interdisciplinary climate assessment. Overpeck has published over 230 works cited 60,000+ times, emphasizing public education, university-community partnerships for climate solutions, and environmental justice initiatives. PhD in Geological Sciences, Brown University MSc in Geological Sciences, Brown University BA in Geology (Honors), Hamilton College His research spans climate-biosphere interactions , climate variability and abrupt change , monsoon dynamics , drought and hydroclimate , sea level rise , climate law , and climate adaptation . Overpeck pioneered studies on megadrought terminology, temperature-driven drought intensification, and the aridification of North America. His work with the NOAA Paleoclimate Program and World Data Center for Paleoclimatology established foundational understanding of climate dynamics through annually-laminated sediment analysis in the Cariaco Basin. Overpeck's 2020-2024 research includes climate aridification , hydroclimate scaling mismatches , and temperature-precipitation interactions , with recent focus on Antarctic heatwaves, Mississippi River Basin changes, and corporate climate accountability. His article trends show concentration in climate attribution , hydrological extremes , paleoclimate modeling , and climate policy analysis . Scientific Honors: 2024 U.S. National Academy of Sciences 2015 American Geophysical Union Fellow 2009 AAAS Fellow 2007 Nobel Peace Prize contributor (IPCC) 2005 Guggenheim Fellowship Multiple U.S. Department of Commerce awards Overpeck has led or participated in significant climate adaptation projects , including NSF grants totaling $5.1M+ for Southwest Hydroclimatic Extremes (2017-2020), Amazon Drought Impacts (2014-2018), and Quantifying Drought Risk (2013-2018). He serves on the Colorado River Research Group (2014-present) and advises Climate Communication (2011-present). Current initiatives include Great Lakes University positioning, Michigan's climate resilience planning, and the Audacious Water podcast series examining Mississippi River Basin transformations. Overpeck actively contributes to climate policy discourse , advocating for science-informed decision-making and stakeholder collaboration across government, military, and corporate sectors.

• Climate Change
• Climate-Biosphere Interactions
• Climate Variability
• +۷ مورد دیگر

John E. Taylor is the Frederick Law Olmsted Professor and Associate Chair for Faculty Development and Research Innovation at the Georgia Institute of Technology's School of Civil and Environmental Engineering within the College of Engineering. His research focuses on the intersection of human and engineered networks, with particular emphasis on creating resilient infrastructure systems that serve society's needs while creating more livable communities. Taylor's research interests span multiple domains including Smart City Digital Twins , Urban Infrastructure Resilience , Network Dynamics , and Building-Occupant Interaction . His work examines how human behavior, infrastructure systems, and environmental factors interact during normal operations and extreme events. He has developed innovative approaches to understanding urban systems through the lens of network theory and computational modeling. His publication record demonstrates consistent contributions to the fields of urban analytics and infrastructure resilience, with a recent focus on digital twin technologies for urban systems. Taylor's work shows a clear trajectory toward increasingly sophisticated integration of AI, network science, and civil infrastructure engineering to address complex urban challenges. His research has particular relevance for cities facing climate change impacts and seeking to build more equitable and resilient communities. Taylor leads the Network Dynamics Lab at Georgia Tech, where he mentors PhD students and postdoctoral researchers. His lab has produced significant work on human-infrastructure interaction, particularly during disasters and extreme events. The lab's research combines computational modeling, data analytics, and field studies to understand and improve urban systems. His work has been applied to real-world challenges including river emergency response systems, urban heat exposure forecasting, and disaster response optimization. Taylor has collaborated with city officials and agencies to implement systems that have demonstrable community benefits, such as the AI-enabled camera system for drowning prevention on the Chattahoochee River and crime reduction systems using mobile cameras guided by AI algorithms.

• Smart City Digital Twins
• Urban Infrastructure Resilience
• Network Dynamics
• +۵ مورد دیگر

Dr. John Lehrter is a Professor of Marine Sciences and Associate Director of the Stokes School of Marine & Environmental Sciences at the University of South Alabama, as well as a Senior Marine Scientist at the Dauphin Island Sea Lab. He holds a Ph.D. in Marine Sciences from the University of Alabama (2003). His research focuses on coastal biogeochemistry, ecosystem modeling, and satellite ocean color remote sensing, with an emphasis on understanding eutrophication, hypoxia, and multiple stressor impacts on coastal ecosystems. Dr. Lehrter has advised numerous graduate and undergraduate students and leads a lab engaged in field studies, numerical modeling, and satellite data analysis. His work addresses societal challenges in coastal management and climate change adaptation. Research Interests: Multiple Stressor Impacts to Coastal Ecosystems, Marine Biogeochemistry, Ecosystem Modeling, Satellite Remote Sensing, and Hypoxia Dynamics. His lab develops tools to quantify nutrient pollution effects and predict ecosystem responses to management actions. Advising and Grants: Dr. Lehrter oversees a dynamic lab with graduate students, postdocs, and technicians. Current projects include modeling nutrient dynamics, satellite data applications for water quality, and experimental studies on multiple stressors (e.g., temperature, pH) impacting marine organisms. His lab collaborates with agencies like the EPA and NOAA, contributing to coastal policy and restoration efforts. Labs/Teams: Dauphin Island Sea Lab (DISL) and the University of South Alabama’s Stokes School of Marine & Environmental Sciences. The lab recently established a state-of-the-art facility for multiple stressor experiments on marine species.

• Coastal Biogeochemistry
• Eutrophication Dynamics
• Hypoxia Modeling
• +۷ مورد دیگر